Adding-machine.



. M. o. Ummm.

ADDING MACHINE.

APPLICATION FILED AUG. 7, 1907.

Patented Sept. 22, 1908.

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vand chine which occupies small compass and can `be carried 1n the UNITED sfrnrnsrnrnnr onnrcn..

MANsFlELD c. cna'wLnY, or oncur'r, ciitironrni.

{ADDING-MACHINE.

i .Specification o f Letters latent.

Patented sept. 2 2,r 190s.

Application filed Aaugust 7,- 1907. u Serial No. 887,560.

To all whom "it may concern:

Be it known that I, 'MANSFIEILD GRAW-'- UniteduStates, residing' LEY, a citizen of the at Orcutt, county of Santa Barbara, aiid State of California, have invented a new and useful AddingMachine, of which the following is a specification."

. This invention relates to adding machines particularly to a portable adding mapocket, and the objects of the invention are to provide an adding n1achine of this character which is of exceedingly simple and economical construction, which is adapted to be constructed of sheet metal and which is accurate and durable in use.

The accompanying 'drawings illustrate the invention and referring thereto 'Figure 1 is having a wide -dinally through the device.

l vided with a knu'rled finger piece 13 by W the shaft may readily be revolved by 4the firk' gers of one hand, while the main barrel 1 1s a perspective view of the invention.

Fig. 2 is an enlarged sectional View taken longitu- Fig. 3 is `a cross section on line 13-x3 Fig. 2. Fig. 4 is a perspective view of the shaft, the carrier assembled therein, and one count wheel in place,V the other count wheels being removed to reveal the spring `fingers and cams-of the carrier. Fig. 5 1s a perspective view of the barrel 1 and comprises a cylindrical shell hav; ing at one end a head 9,y a head ,1- beingscrewed nin th'e lother end of the shell. The 'head 10 is provided with' a short fstud 11` 'which is" journal'ed' Ain the head 2, whilea stem 12 is attached tothe head 9 and is journalcd in thehead 3, the stern 12 -bemg ro held stationary with Vthe other hand.

The shaft 8 is provided in the present case with a series of four openings 14 as clearly."

shown' in Fig. 4. ested Within the hollow shaft 8 is a carrier 15 which, as shown in'Fig. 5, consists 4of a shell cut longitudinally and .wheels 22, 23, 24 and 25, each being carrying pins are adapted to -be' ocked with 'slitted transvei'sely'to forni a series-of four"1 `spring fingers 16,'the end of each spring fin? ger having a V-shaped end-17 forming a de tent or latch. The carrier isl also provided with three cams 18 which are struckl up from the ymetal forming the carrier, as' clearly shown in Figs. 2 and 5, each cam 18 havingan abruptel face 19 and a cur-ved face 20' as shewnin Fig. 3. vThe shaft 8 is provided with three segmental slots 21 through which the1 respective cams 18 project, each slot 21, as shown in Fig. 3, being of sufficient length,v` to receive its cani 18.

Mounted on the shaft 8 are four count l provided with ten numerals spaced equally apa-rtn and 6, as the count wheels are rotated forward, as follows.: 0, 9, 8, 7, 6, 5, 4, 3, 2, l. An index wheel l26 is mounted on the head 9 of shaft 8 and is likewise provided with numerals but which will be presented at the sightnpening 7 in the following order: 0, 1, 2, 3, 4, 5, 6,7, 8, 9. The index Iwheel 26 is l which will be presented at the sight opening fastened to the head 9' by la pin 27 and -is formed with an annular recess 28 which receives a helical spring 29, one end of which is attached to the index wheel 26 and the otherf end is attached to the stationary head, 3.

Stop pins 30 are' provided to prevent the index wheel 26 and Vshaft 8 from being turned further than one revolution forward in the direction of the arrow Fig. 3-to vbring its numeral 9 in'to the sight opening 7'-,- andthe spring 29 serves to return the shaft 8 and 'inJ dex wheel to normal positionafte'r each setting of the index wheel v26 so..that normally the 0 f the index wh'eel 26 will appear at the sight' opening 7i. Each 'count-wheel has. an external series'fcf1 ten notches 31 grooved 'between the-H respective numerals, one of which notches is prvidedwith ai ,square shoulder tojonma cleaning notch-32, clearly seen in Fig.;3. Each count wheel is formed with'aiiange.- 34' and ten notches 33 are formed in" the inner face of the flange 34.

Each count wheel is also provided with -a set of t'en internal V-shaped notches 35, .which latter7 notches are adapted to coact with the latches 17 of the spring finders 16.

Three of the count .,wheels, viz., 22, 23 and 24, are. each -providednwith an Lshaped eti iot-

spring pin 36, termed the carrying pin, which l the internal notches .33. Each .carrying pin 36normally stands out of engagement Wit a notch' 33 but may be moved into` locked en- Q'agement with a notch 33 by a cam 18 as illustrated in Fig. 3.

Slide-ble in the slot 4 is a column shifter 37 which, as clearly shown in Figs. 1,- 3 and 6, consistsof a curved blade 38 having an ofset portion' which extends through the slot 4.

By sliding the column shifter 37 into line with either-one of the coimt wheels 22, 23, 24 or 25, and by pressing down with the thumb, the metal of the barrel 1 may be sprung down to cause the end of the blade 38v y count wheels when the clearing plate 39 is sprung in by pressing in the metal forming t e barrel 1 1n a manner similar to that 1n which the column shifter 38 1s sprung in.

. rfhe slot 5 permits of this inward springing action of the metalfornaing the barrel 1 and it will be seen that when the clearing plate is thus sprung in thatit will allow the respective count wheels to rotate backward with shaft 8 until-the clearing notch 32 of each count wheel arrives at its associated spring finger 4() of the clearing plate, at which time the spring finger arrests further rearward movementof the count wheels and the normal position of the count wheels is thus secured, all of the count wheels when in such position presenting 0 at the sight opening 6.

In operation lthe barrel 1 is held in the left hand and the process of addition consists in turning forward the knurled finger piece 13 to successively bring numerals on the index wheel into position at the sight opening' 7. After each numeral has been thus turned I into othe sight opening, the finger piece 13 is released by the lingers and the spring 29 re stores the count wheel 26 to zero. Each time that the shaft 8 is turned forward to bring a numeral into the sight opening 7 and is returned bythe spring 29, all of the count wheels 22 23, 24 and 25 are turned forward and back with the shaft 8 by the detente 17 of the spring fingers which engage in the internalnotches 35, the spring fingers 17 always turning in both directions with shaft 8 because the barrel 15 is locked therewith by the cams 18. XNhile the numerals are thus being successively turned up at the sight o ening 7 the column shifter 37 is held over t e count wheel 22 while the first column is 'being added and although the count wheel 22 turns back with the shaft it is prevented from thus only count wheels 23, 24 and 25 turn both ways with the shaft while count wheel 22 is turned in a backward direction only and keeps up such intermittent backward rotation until disengaged 'by the column shifter, sothat it may make several complete revolutions before the first column of units is run up. q

When commencing an operation of addition, the column shifter is placed over count wheel 22 and kept there while ruiming up the units column. After the units column is added, the column shifter is slid over and engaged with the count wheel 23 for the tens, and' so on. All of the count wheels being detachably fixed in a certain position to the shaft 8 revolve in bothwdirections therewith as one piece, and the count wheels always turn with the shaft 8 in both directions except when one of them is arrested from forward movement, at which time its relative position on the shaft 8 with respect to the other count wheels will be changed and at the conclusion of the process, before clearing, the respective count wheels on the shaft 8 will still turn as one piece with the shaft 8 whenever the shaft is turned, but their respective positionswill rhave been changed during the process of addition so that the sum of addition will be indicated at the-'sight openings 6 and 7. The index wheel always turns both ways with theshaft, but has no mechanical function in carrying, serving merely to indicate to the operator how far to turn the shaft each time.

As the shaft is turned forward, for example, to bring the numeral 9 at the sight' opening 7, the column shifter 37 is held over the count wheel 22, and as the count wheel 22 is prevented from forward rotation by the column shifter 37, it remains stationary while the shaft rotates' within it carrying the count wheels 23, 24 and 25 and the index wheel 26 with it' until the numeral "9 of the index wheel 26 appears at the sight opening 7. The latch 17 that is associated with the count wheel 22 clicks into the notches 35 as the latch is carried around with shaft 8. The count wheel 22 now having been held stationary during nine points of revolution of the shaft, will, when the shaft 8 returns'to zero, change its position with relation to the sight opening 6 an equal number, t'. e., nine points, the blade 38 allowing the notches 31 to click back thereunder. The numeral 9 on the count wheel will now bepresented at sight opening 6. Assuming that the next numeral in the units column to be addedis 5, the shaft 8 is again turned forward to bring the numeral 5 of thevindex wheel to the sight opening 7, and as before, all' the count wheels turn forward with the shaft. except count wheel 22 which asl before is held from forward rotation bythe column shifter 37. The carrying pin 36 being situ- 22 by the carrying the limit and ated midway between 9" and 0 on the count wheels, and the cam 18 being situated onl the shaft ina position coincident with the 0 on the index wheel, the cam 18 that is associated with count wheel 22 is now (at the beginning f the movement) in conjunction with carrying pin 36 on count wheel- 22, forcing it into a notch 33 in count wheel 23 as shown in F ig. 3, thus locking count wheel 23 to count wheel 22. Count wheel 22 being held stationary by column shifter 37, and count'wheel 23 being locked to count wheel pin 36, the cam"18 is care shaft 8 one step, wherepasses from under the carried forward by t upon Ythe cam 18 rying pin 36, and the latter springs out of'` notch 33 in count wheel 23, thus allowing count wheel 23, after being detained one point, to be' carried forward with shaft 8. Sincethe .positionof count wheel 22 with relation to shaft .8 has been changed five points, and pgsition ofucount .wheel 23 has been chan e'done pointu on the' shaft, their positions with respect to the sight opening,

on being turnedback, will cause count wheel' n2 3 to .present 1 and count wheel 22 to present 41" at the sight .opening 7. This action is repeated again and again, the vcount wheel 23 in turn carrying to the count wheel has been'run up and .then 'the column shifterf' 37 is moved to stand over the count wheel 23 and the same process continues, each count wheel being caused to'carry one point to the next higher wheel byv means of the associated cam 18 which locks the carrying pin 36 to the next higher count wheel. After all of the columns have been run up in this manner, the sum of the addition is read at the sight opening.

After obtaining the result the machine is cleared and the count zero by turning the. index wheel forward to pressing in the barrel 1 so that the spring fingers 40 of the clearing plate 39 will engage with the count wheels and then turning the index wheelu back to zero. The square notches 32 on the count Wheels will catch on the spring ing'ers 40 of the clearing, plate 39 and be retained in that position in which 'position the 0 on each count wheel is shown at the sight opening, after which the pressure against the barrel 1 may be released so that the clearing plate will stand free from the count wheels.

What I claim is 1. In an adding machine, a longitudinally fixed, rotatable shaft, a series of shouldered .count wheels thereon, yielding means connected with the shaft for engaging with said shoulders and normally locking the wheels upon the shaft so as to be reciprocally routated therewith, means for restraining the count wheel to change its relative position upon the shaft, and means wheels restored to connected with the shaft' for causing an a'djoining count wheel to be automatically locked with a preceding count wheel when said preceding wheel counts ten points.

2. In an adding machine, a shouldered shaft, a series of count wheels on the shaft detachably engaging the shoulders of said shaft, carrying pins for locking each two adjoining count wheels, and radial cams carried by the shaft for actuating a carrying pin during onestep in'the revolution of the shaft.

3. In an adding machine, a shaft, a series ofcount wheels detachably engaging the shaft and having notches, a carrying pin on a count wheel adapted to enter a notch of the adjacent wheel, means for preventing reverse movement of a count wheel, `and a cam on the shaft for pressing the carrying in into a notch during one step in the revo ution of the shaft.

e. In an adding machine, a shaft, a series of count wheels thereon each having two sets of internal notches, spring fingers projecting from the shaft and detachably engaging one s et of lnotches, a carrying pin 'on a count wheel adapted to enter a notchl of the other set, and a cam on the shaft for pressing the carrying pin into a notch during one step in the revolution of the shaft. 24, and so on until the first column of figures '5. In an adding machine, a shaft, a series of count wheels thereon each having two sets of internal notches, spring fingers projecting from the shaft and detachably engaging one set of notches, a carrying pin on a count wheel adapted 'to enter a notch of the other set, a cam on the shaft for pressing the car ing in into a notch during one step in t e revo ution of the shaft, and means .for preventing reverse movement of a count wheel.

' 6. In an adding machine, a shaft, a series of count wheels thereoneach having two sets of internal notches,` spring fingers projecting from the shaft and detachably engaging one set of notches, a carrying pin on a count wheel adapted to enter a notch of the other set, a cam on the shaft for pressing the carry- Iing in into a notch during one step in the revo ution of the shaft, the count Wheels having external notches, and a column shifter adapted to be shifted over and engaged with a count wheel to revent reverse movement,v of the count wheel? f 7.- In an adding machine, a'barrel, a shaft on the shaft, a series of count wheels revoluble on the shaft and having internal notches, s ring1 fingers projecting from the shaft for etac ably en aging said notches, cams projecting from the shaft, means actuated by a cam for locking two count'wheels together during one step in the revolution of the shaft, and a column shifter slidabfe along the barrel adapted to beengaged with a count wheel revoluble in the barrel, an index wheel fixed to prevent reverse movement' of the count wheel.

8. 1n an adding machine, a barrel, a shaft revoluble in the barrel, an index wheel fixed on the shaft, a helical spring in the index` Wheel for returning the shaft and index Wheel to normal position, a series of count Wheels revoluble on the shaft and having'internal notches, spring fingers projecting from the shaft for detachably engagingsaid notches, cams projecting from the shaft, means actuated by a cam for locking two count Wheels together during one step in the revolution of the shaft, and a column shifter slidable along the barrel adapted to be engaged With a count Wheel to revent reverse movement of the count Wheel).

L,9. lny an adding machine, a barrel, a shaft revoluble in the barrel, an index Wheel fixed on the shaft, means for automatically returning the shaft to normal position, a series of count Wheels revoluble on the shaft and having two sets of internal notches, carrying pins mounted on certain count Wheels, cams projecting from-the shaft, each cam having a path of movement under a carrying pin sfor moving the carrying in to lock two adjoinin0r count Wheels, an a column shifter slidabile along the barrel adapted to be engaged with a count wheel to prevent reverse movement of the count Wheel.

10. In an adding machine, abarrel, a holloW shaft revoluble in the barrel, a carrier comprising a shell inside'the shaft havingA a' series of cams and a series of spring fingers Which extend through o enings in the'shaft,

a series of count Whee s revoluble on the shaft and having internal notches Which engage With said spring fingers, spring carrying pins carried by certain count Wheels, each carrying pin adapted to be sprung by a cam into a notch in an adjacent count Wheel, lan index Wheel fixed on the shaft, a helical spring for returning the shaft to normal position, and a column shifter slidable along the barrel and adapted to engage any count Wheel to prevent reverse movementof that count Wheel.

11. ln an adding machine, `a barrel, a hollow shaft revoluble in the barrel, a carrier comprising a shell inside the shaft having a series of cams and a series of spring fingers which extend through openings in the shaft, a series of count Wheels revoluble on the shaft and having internal notches which engage With said spring fingers', spring carrying pins carried by certain count Wheels, each carrying pin Vadapted to be sprung by a cam into a notch in an adjacent count Wheel, an index Wheel fixed on the shaft, a helical spring for returning the shaft to normal position, the barrel having a longitudinal slot, and a column shifter slidable in said slot and comprising a blade adapted to be engaged with external notches of the count wheels vby springing in the metal of the barrel adjacent the slot.

12. In an adding machine, a barrel,- aholloW shaft revoluble inthe barrel, a carrier comprising a shell inside the shaft having a series of cams, and a series of spring fingers which extend through o en ings in the shaft, a series o f count Whees revoluble on the shaft and having internal notches which engage With said spring fingers, spring carrying i pins carried by certain count Wheels, each carrying pin adapted to be sprung by'a cam into a notch in an adjacentcount Wheel, an index Wheel fixed on`the shaft, a helical spring for returning the shaft to normal position, a column shifter slidable along the' barrel and adapted to engage any count Wheel to.

prevent reverse vmovement of that count soY Wheel, -each count Wheel having a clearing notch, and a. clearing plate attached inside the barrel and having spring fingers ada ted to engage the clearing notches only, the ar-,;

rel being slit adjacent the clearing plate to permit the metal of the barrel to be sprung in to cause theucle'aring spring fingers to operate.

13. 1n an adding machine, a barrel, a shaft therein, a series of count Wheels on the shaft and having external notches, the barrel hav.-

ing a longitudinal slot, and a column shifterl 7 comprising a blade With an offset bend slidably engaging in the slot to permit the-coli umn shifter to be placed over any count vvheel, the slof-'inr the barrel also permitting A the metal of the barrel being pressed 'in to cause the blade of thevcolumn shifter to engage the notches of a count Wheel.

14. In an adding machine, a barrel,a shaft therein, a series of count Wheels on the shaft and having external notches, the barrel havling a longitudinal slot, a column shifter comprising a blade with an offset bend slidably engaging in the slot to permit the column shifter to be placed over any count Wheel, the slot in the barrel also permitting the metal of the barrel being ressed in to cause the blade of the column shifter to engage the notches 'of a count wheel, one of said notches in each count Wheel having an abrupt shoulder forming a clearing notch, anda clearing plate attached inside the barrel and formed with spring fingers, the barrel having a slit along the clearing plate to enable the metal of the barrel being pressed in to cause the clearing fingers to engage with the clearing notches,

15. In an adding machine, a barrel having heads, a hollow shaft having heads, a stud on one of the latter heads journaled in'a head of the barrel, a stem on'the other shaft head journaled in the other head of the barrel 4and groove With one end attached to the barrel In testimony whereof, I have hereunto set and the other end to the shaft for returning my hand at Santa MariaCalifornia this 30th 'the shaft7 means for restraining movement of day of JulT 1907.

a count Wheel to change its relative position I MANSFIELD C. CRAWLEY. 5 With the shaft, and means Jfor temporarily In presence olfautomatically locking another count Wheel F. D. HALL, with the rst named count Wheel. JOSEPH ROEMER. 

